I am going to build a few round pens for hog traps and wanted to pick yalls brains on what you use or have had success with as the best gate/trigger system. Open to all ideas and feel free to post pictures if you have them. TIA

I would 100% without a doubt do a drop down door. I am just not sure what is the best way to do a trigger for it.

What I have had good luck with is hammering a piece of rebar in the back and typing wire on the door and tying a washer on the end. Set the washer barely on the rebar and pile up corn around it. The wire has to be strong enough to hold the weight of the door up

All good ideas. I will look into them. I have access to an unlimited supply of any wood I want aomim prob going to build a falling door out of that. Then I’ll prob try a few different things until I find the right trip that works best.

For a trigger I attach a rope between my gate and a stick, which is held by a tire. There's corn in the tire and they have to root it aggressively to release the stick, which hogs will do.

I've use a swing gate. The wider the better. I covered it with sheet metal, the idea is if they can't see through it they won't bash into it so hard. The rest of the trap is easier to repair than the gate.